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  1. #1

    Default A/C blows hot at idle, cold on freeway

    When I first start my truck in the morning the a/c blows cold. However at lunch when I start my the a/c will not blow cool until I get up to speed and even then it is not blowing as cold as it was first thing in the morning. I know it is hotter during the middle of the day but if I sit in my truck to eat lunch the a/c will start to blow hot again. Then it will cool down some as I start moving. Any suggestions?????

  2. #2
    stephan's Avatar
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    Sep 2010
    Far West, Oregon USA,
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    It sounds like your ac condenser doesn't have enough air flow through it when you're sitting idleing.
    I don't know what year, model, or what mods you might have on your truck, but if you have electric engine fan(s) on it, make sure it/they are coming on whenever you turn on the ac. The ac condenser works exactly like your engines radiator. It has to have lots of airflow over it whenever the ac is on for the ac to cool effeciently.
    1988 Chevy C-3500 2wd (no pic)
    350 c.i. 5.7 L Stock Block, 4 Bolt Mains
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    No rev limiter, No speed limiter lol

  3. #3


    I have a couple of vehicles that I have wired that when my AC is on so is the electric fans.

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